A Digital Camera And Screw On Lenses

Is it possible to find a digital camera....preferably with a zoom, but not needed , if it will take my screw on lenses (from my 35mm)?

Also...staying around $250.00...is there a digital camera (14-16 megapixel, zoom) that has your standard viewfinder. (I have a hard time seeing the picture I want to shoot, with the reflections, on the viewfinder screens.)

Anyone's opinion on the best camera in this price range (and where is the best place to shop), would be much appreciated.